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Thread: daikin problem

  1. #1
    nttrac@gmail.co's Avatar
    nttrac@gmail.co Guest

    daikin problem



    i know l9 is compressor lock on a vrv2 system. But dont know were to go from here.On the same system uh and f3 came up on test could it be a pcb problem



  2. #2
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    Re: daikin problem

    OK,

    L9 = Stall prevention
    UH = Improper connection of transmission wiring between outdoor unit and outdoor unit outside control adaptor
    F3 = Abnormal discharge pipe temp.

    You might be right, the PCB might be on the blink..

    But I would investigate a bit further before I order a new one.

    Disconnect the inverted compressor, reset the unit and carry out a inverter check procedure just to see what happens.....

    No doubt one of the Daikin guys will be able to give better information shortly.

  3. #3
    tonares's Avatar
    tonares Guest

    Re: daikin problem


    UH - Malfunction of system, refrigerant system address undefined


    * if you didn't worked with automatic addressing you must set address for each indoor unit, maybe you forgot some
    * check the wiring connection between indoor and outdoor unit.

    F3 - Abnormal discharge pipe temperature outdoor unit

    * check the discharge temperature sensor, they are on the right side of the outdoor unit PCB

    L9 - Inverter startup error


    * check if stop valve is opened
    * is a difference between high and low pressure prior to startup 0.2MPa? If not check the refrigerant system.
    * check compressor wires, and measure windings




    If you need more help do not hesitate to ask

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